package com.routz.nettydemo.sprbootintegrate.server;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandler.Sharable;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.CharsetUtil;
import org.springframework.stereotype.Component;

/**
 * Handles a server-side channel.
 */
@Component
@Sharable
public class EchoServerHandler extends ChannelInboundHandlerAdapter {

    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        super.channelActive(ctx);
        System.out.println(ctx);
    }

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) {
        ByteBuf in = (ByteBuf) msg;
        System.out.println("Server received: \n" + in.toString(CharsetUtil.UTF_8));
        ctx.write(msg);
//        try {
//
//            ctx.flush();
//        } finally {
//            ReferenceCountUtil.release(msg);
//        }
    }

    @Override
    public void channelReadComplete(ChannelHandlerContext ctx) {
        System.out.println("channelReadComplete");
        ctx.flush();
        ctx.writeAndFlush(Unpooled.EMPTY_BUFFER)
                .addListener(ChannelFutureListener.CLOSE);
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
        // Close the connection when an exception is raised.
        cause.printStackTrace();
        ctx.close();
    }

}
